A longtime Rangers season tickets holder slapped Madison Square Garden with a lawsuit Thursday — not over the team’s disappointing performance, but because a security guard rushing to break up a fight at a recent game shoved her over a row of seats.

“We were standing watching the very tail end of the game and all of the sudden I felt this push and I went flying over the seats,” kindergarten teacher Eileen Adler, 65, told The Post.

The Rangers die-hard, who has had season tickets in the nosebleeds that used to be known as “the blue seats” at the Garden for 25 years, broke two ribs in the fall.

The Middlesex County, NJ grandmother was attending the May 23, 2012 game against the Devils with her son who played hockey for Cornell University.

The security guard who pushed Adler from behind never even turned around to see if she was okay, according to her attorney Andrew Buzin.